test_financial.py 文件源码

def test_irr(self):
        v = [-150000, 15000, 25000, 35000, 45000, 60000]
        assert_almost_equal(np.irr(v), 0.0524, 2)
        v = [-100, 0, 0, 74]
        assert_almost_equal(np.irr(v), -0.0955, 2)
        v = [-100, 39, 59, 55, 20]
        assert_almost_equal(np.irr(v), 0.28095, 2)
        v = [-100, 100, 0, -7]
        assert_almost_equal(np.irr(v), -0.0833, 2)
        v = [-100, 100, 0, 7]
        assert_almost_equal(np.irr(v), 0.06206, 2)
        v = [-5, 10.5, 1, -8, 1]
        assert_almost_equal(np.irr(v), 0.0886, 2)